Finding the Fourth Proportional to 2,389.10, 3,583.58 and 928.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,389.10 : 3,583.58 = 928.53 : x
2. Step 2: Convert to fraction form
   2,389.10/3,583.58 = 928.53/x
3. Step 3: Cross multiply
   2,389.10x = 3,583.58 × 928.53
4. Step 4: Simplify right side
   2,389.10x = 3,327,456.89
5. Step 5: Solve for x
   x = 3,327,456.89/2,389.10
6. Step 6: Final answer
   x = 1,392.77